Lander h



i operate; and also to make certain the case.

each abutment in the drawing.

nux rnnn. HARDYAND no 12. wool), on CINCINNATI, OHIO, ASSIGNORS To pm 7 L unnn H. noo'rs nun runners M. Roo'rs, on oonNnnsVILLn, INDIANA.

Letters Patent No. 104,585, dated June 21, 1870.

rMPRovnMEN'r In BLOWERS.

The Schedule referred to in these Letters Patent and making part of the same.

Be it known that we, DEXTEE'D. Kenny and En E, WOQD, of Oinciunati,inthe county of Hamilton,

and Stateof Qhio,'lhavc"in-vented certain new and useful Improvements 3 in Rotary Blowers; and we do hereby declare thatrthe following is afull and correct descriptionl of the same, reference being had to tthe annexed drawingfmakinga part ofthis specificaion. i 1 Theobject of this. invention -is to construct both the interior parts of the case and ,the abutment-s, or

interior working-parts of the blower, so as to be true" f and accurate iu their combincd t proved manner. and at a verysmall cost for workman operation, in an i mship, compared with that of boring out the case or fitting it and the interior working parts on the lathe or planer. q i

our methodof accomplishingthis object is to constructthe abutments and casein such manner as most advantageously toreceivejand'retain adhesive compounds, other than the hydrates, such as anyof the adlhesivegums dissolved, and the solution thickened by any suitable substaucefso asto give thereto sufiicicnt consistency, by which, when properly applied the op-- eratmg parts are rendered true and accurate; and also to construct the abutments with such number of wings or. pistons as will most advantageously preserve the contact. of the .pistons with the recesses in which they useful projections onthe lsides'of" the: pistons and alsoto intersect the case at the plane of the axis of the shafts, and to construct the opposite part of the case in the most suitoperation.

ablemannenpashereafter described, to completeits ilnfthe accompanying-drawing similar lettcrsof ref erenceindicate correspondingparts.

Figurel is a vertical cross-sectional view of the blower, showing the position of the abutments relativelytoeaeh other and to the case.

a front elevation of the end of the blower.

Figure 3 isa top viewof the bottom of the case. A A represent the upper part of the blower-case. BB represent the conjcayearcs of the case.

j 03 i show the terminations fot the ares B B; O 0' represent the co acting abutments.

DD are the pistons. i 1' EE' are the recessesinwhich the pistons operate. In n; are the projectio s'onthe sidesof' the pistons.

j G represents thelower part-of the case. F F are the shaftsof the abutments. H 11 represent the legs cast on the lower part of \Five pistons and five recesse'sfare represented in There are peculiar advantages in making them with thisnumber," for, with this r number of pistons, the recesses E E will [consist of but littlehmore than half circles, and the contact of the piston is preserved with its corresponding recess in its revolution, until the secondary piston of the opposite abutincnt will come in contact with its recess. Another important advantage secured bythis arrangement is the projections n n on the sides of the pistons, which form a valuable support for the lining of the recesses.

The projections n a, on the sides of the pistons shown in the drawing, are not on the pitch-circles,

(that is, equal tangent circles drawn on the centers of. the abutments,) but are within the pitch-circles. This is an important feature, which greatly facilitates the construction of the machine. With a less number of pistons, these results cannot be secured, while, with a greater number, these results can be secured in some degree, but not so advantageously. 'We consider five pistons much the best number to beuscrl.

-"lhe arcs B B are concentric with the shafts of the abutments',=and should extend somewhat more than the distance from-the outer extremity of one piston to that of the nextfpiston.

The lower part of the case G is connected with the upper part A atitheaxial plane of the shafts of the abutments, with screws orv bolts, and may be madebf any desired dimensions, audwhen used for purposes of bothexhausting and blowing, should have its lower opening so contracted as to make a suitable connection with an exhaust-pipe. Thus constructedthe pis-v tons can befonly introduced or removed by separating the upperpart'A from the lower part G of the case.

We render the interior arcs B B of the case, and also the ends of the case, true, so as accurately to fit the-revolving abutments as follows:

. \Ve' have found by experiment that, 11611 13110- Surfaces of the iron are suitably cleaned, a cement made of a solution of some of the gums, as copal, shellac, &c., when brought to a suitable consistency with brick-dust, earth, paints, plumbago, 860., adheres with great tenacity to the surface of the iron. A coate ing of this or similar material is applied with a paintbrush, or any convenient manner, until a coating of suflicient thickness is obtained. And, when partially hardened, the parts are made to operate together in their proper position, by which means any superfluous amount of the cement is removed. In like manner the lower part of the case G, or so much of it"'as is required to preserve the contact of the parts, as shown in figs. 2 and 3, may helined. p The. recesses E E of the abutments are lined with the same material, applied and rendered true in the same manner as the interior of the case.

'lhe abutments are connected and made to revolve simultaneously by two cog-wheels.

The operation of the machine is as follows:

a When the abutments are made to revolve in the direction of the arrows, the air carried in by the pistons,

. in contact with the arcs B B, being prevented from escaping backward internally, by the contact of the pistons with their-respective recesses, will he forced through the discharge-opening at the top of the case.

Having thus described our invention,

What we claim, and desire to secure by Letters Patcut, is-- 1. The ahutments 0'0, having five ormore pistons and five or more recesses with curved projections 11 n, made so as not to come in contact with each other, when constructed and arranged to operate substantially as and for the purpose set forth. I

2. A blower-case, consisting of the upper and lower parts A and G, united at the plane of the axes of the shafts l b-when constructed and arranged to operate in combination with internal co-acting abutu1euts,sub-

stantially as herein described.

DEXTER D. HARDY.

Witnesses: ED E. WOOD.

JAMES Moonn, H. D. HUNTINGTON. 

